{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T11:22:52Z","timestamp":1771068172571,"version":"3.50.1"},"reference-count":37,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,3,29]],"date-time":"2025-03-29T00:00:00Z","timestamp":1743206400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Council of Technological and Scientific Development","award":["406161\/2021-6"],"award-info":[{"award-number":["406161\/2021-6"]}]},{"name":"National Council of Technological and Scientific Development","award":["88887.691317\/2022-00"],"award-info":[{"award-number":["88887.691317\/2022-00"]}]},{"name":"Brazilian Federal Agency for Support and Evaluation","award":["406161\/2021-6"],"award-info":[{"award-number":["406161\/2021-6"]}]},{"name":"Brazilian Federal Agency for Support and Evaluation","award":["88887.691317\/2022-00"],"award-info":[{"award-number":["88887.691317\/2022-00"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Objectives: Vitamin D plays a crucial role in maintaining bone and muscle health and is associated with various health conditions. Risk factors for reduced vitamin D levels include occupation. The aim of this study was to explore the association between shift work and vitamin D levels among female workers. Methods: This cross-sectional study was conducted among 304 women from an industrial group located in southern Brazil. Vitamin D deficiency was defined as serum 25(OH)D levels &lt; 20 ng\/mL, and deficiency\/insufficiency was defined as serum levels &lt; 30 ng\/mL. Work shift data were collected through interviews using the start and end times of work shifts, classified as \u201cday shift\u201d (6:00 AM \u2264 hh:hh &lt; 10:00 PM) and \u201cnight shift\u201d (10:00 PM \u2264 hh:hh &lt; 6:00 AM), respectively. The association between vitamin D deficiency and shift work was expressed as prevalence ratio (PR), using Poisson regression adjusted for confounding variables. Results: The prevalence of vitamin D deficiency was 36.5% (95% CI: 31.1\u201341.9), while the prevalence of insufficiency was 75.7% (95% CI: 70.8\u201380.5). After adjustment, a significant association was found, with 65% and 17% higher probabilities of having vitamin D deficiency (PR = 1.65; 95% CI: 1.23\u20132.22; p = 0.001) and vitamin D deficiency\/insufficiency (PR = 1.17; 95% CI: 1.02\u20131.35; p = 0.030) among nightshift workers compared with dayshift workers. Conclusions: The findings of this study indicate a high prevalence of hypovitaminosis D among Brazilian female fixed-shift workers as well as a higher probability of vitamin D deficiency and deficiency\/insufficiency among nightshift workers compared with dayshift workers.<\/jats:p>","DOI":"10.3390\/nu17071201","type":"journal-article","created":{"date-parts":[[2025,3,31]],"date-time":"2025-03-31T01:59:36Z","timestamp":1743386376000},"page":"1201","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Association Between Shift Work and Vitamin D Levels in Brazilian Female Workers"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8765-0759","authenticated-orcid":false,"given":"Ingrid St\u00e4hler","family":"Kohl","sequence":"first","affiliation":[{"name":"Pos-Graduate Program in Medical Sciences: Endocrinology, Faculty of Medicine, Federal University of Rio Grande do Sul State, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anderson","family":"Garcez","sequence":"additional","affiliation":[{"name":"Pos-Graduate Program in Medical Sciences: Endocrinology, Faculty of Medicine, Federal University of Rio Grande do Sul State, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"},{"name":"Post-Graduate Program in Food, Nutrition and Health, Faculty of Medicine, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1354-3998","authenticated-orcid":false,"given":"Jana\u00edna Cristina da","family":"Silva","sequence":"additional","affiliation":[{"name":"Post-Graduate Program in Collective Health, University of Vale do Rio dos Sinos, Unisinos, S\u00e3o Leopoldo CEP 93022-750, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1279-7080","authenticated-orcid":false,"given":"Harrison Canabarro de","family":"Arruda","sequence":"additional","affiliation":[{"name":"Post-Graduate Program in Food, Nutrition and Health, Faculty of Medicine, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4042-1913","authenticated-orcid":false,"given":"Raquel","family":"Canuto","sequence":"additional","affiliation":[{"name":"Post-Graduate Program in Food, Nutrition and Health, Faculty of Medicine, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"},{"name":"Hospital de Cl\u00ednicas de Porto Alegre, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-903, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vera Maria Vieira","family":"Paniz","sequence":"additional","affiliation":[{"name":"Post-Graduate Program in Collective Health, University of Vale do Rio dos Sinos, Unisinos, S\u00e3o Leopoldo CEP 93022-750, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria Teresa Anselmo","family":"Olinto","sequence":"additional","affiliation":[{"name":"Pos-Graduate Program in Medical Sciences: Endocrinology, Faculty of Medicine, Federal University of Rio Grande do Sul State, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"},{"name":"Post-Graduate Program in Food, Nutrition and Health, Faculty of Medicine, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-002, RS, Brazil"},{"name":"Hospital de Cl\u00ednicas de Porto Alegre, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre CEP 90035-903, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,29]]},"reference":[{"key":"ref_1","unstructured":"Ross, A.C., Taylor, C.L., Yaktine, A.L., and Del Valle, H.B. 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